Sand-molding apparatus.



2 SHEETS-SHEET I.

. Patentd Feb. 20,1917.

H. TSCHERNING.

SAND MOLDING APPARATUS.

. APPLICATION FILED OCT. a. 1915. 1,216,750.

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Patented Feb. 20, 1917.

2 SHEETS-SHEET 2.

n: Nnnms PETERS co.. nmmumau vusumc you n c HENRY TSCHERNING, or F EEP RT, ILLI 'IN'G COMPANY, OF FREEPORI, 'I [LLI1\TOIS,-A CORIEORATION Oli ILLINOIS.

sAND- oLnIiae APPARATUS. I,

To all whom it mat concern:

Be it known that I, HENRI 'TsorIERNINe,

a citizen of the United States, and resident of Freeport in'thecounty of Stephenson and State of Illinois, have invented certain new and useful Improvements in SandlVIoldingApparatus, of which the following is a specification, reference being had there into the'accompanying'drawing.

In certain rock-oversand molding ap- 1 p'aratus it is common to place a'patternthe Vided with inclined arms which board and flaskupon a plate or table adapted to rest upon a jarringsupport; and to secure this plate to the "rock-over-"frame by which the filled flask is inverted. The table is secured'to the frame by devices which in one condition allow the plate and supported flask tobe vibrated vertically'or jarred as if free from thefframe and which in another condition bind the 'p'late firmly to the frame.

This invention pertainsto securing-dc vices adapted" to pass automaticallyfat proper times, from one condition'to the so that the operator rapidly formmolds, invert them, remove the pattern,"and returnthe arasite initial posi 'tion ready for forming another mold; all without considering locking and unlocking. By these means .theflaily output is materiallyincreased, and at the same time strain, fatigue and liability to errors are decreased. In the accompanying drawingsi Fi ure 1' is a 'sideelev'ation of a portion of a sand molding mac'hine'p'rovidedwith my devicesi 1 F ig. 2 is a plan view partly in section of a rock-over name. I Figs/3, fare detail views partly in section'of certain table lockingdevices. "F 5 isa sectional view "showing in de- In these figures, 5 represents a base having between its ends a standard '6 and on'op posite sides of the standard, respectively, a jarring device 7 and a mold support '8. A normally horizontal plate'or frame 9 is centrally 'cutaway"to drop" overth upper portion of the jarring'device and is proar'e pivoted in the standard to swing approximately'l'80 about an axis 10 tobring the frame again to horizontal position above the support 8 where it is arrested bythe top of the standard- 6.

Above frame when'it QsurrQundsthe the corresponding cylinder;

l inclined face paths for the fluid spcificafivfi o Letters at Patented Feb. 20,1917. Application filed October aisle; Serial No. 12 ,o'." i

jarring device is a plate or table 10"which frame by a rigid bar-'12 the ends of which 1 are held between 'nuts 13"and the middle part of which isprovided above with an incl nedface 14E. Between the bolts of'ea'ch palrasmall power cylinder 15'is fixed to theframe with its piston rod 16 sliding in a bearing 17', and tothe piston rod is fixed a block 18 arranged to strike the inclined face flt and push the bar '12 aside, when the piston and'rod are forced in the proper directlon; thereby pulling the rods in their Ways "in;the' frame, and'drawing the table firmly v and practically locking against the latter thetwo together. That'the parts may be unlocked-when in position for jarring-and maybe automatically locked 'whenthey pass from that position, I provide a spring for holding the parts locked and provide for shifting to unlocked condition when the frame swings down to positionrfor jarring.

A convenient construction is illustrated,

fluid under pressure being brought through hose pipes 19 to T unions 20in onelend of each of 'Which'is secured a hollow rod- 21 through which air passes to aslide valve de- '-v1c'e22 govern1ngthe admiss on of aii to" i .while' in the other end of the head of'the 'T isfixed an alining closed extension 23 sliding without rotation in a bearing 24', abutting against the standard 6, and pushed back thereby so far asto shift the slide 1valve'22 and compress a spring 25 'coiled' about the rod between the cylinder and a shouldervor block 26on therod. So long as the frame remains in jarring position itsweight holds the spring compressed and keeps the slide v'alvein position to prevent the fluid from pushing the piston and block 18 toward the i i 14, and the table, bolts, and bars are thus left free to vibrate with the. jarring devicesf the springs force the rodsoutward, opening to f reach V the opposite When the table beginsto swing upward,

sides of the pistons where it pushes the blocks on the piston rc'ds over the inclined surfaces on the the table to the frame as In use, a pattern plate 30 is table, a flask 31 is'placedupon the plate and filled with sand which is packed about the pattern in part, at least, by jarring. A cover is then placed upon the flask and secured to the table in any suitable way. The frame is then rocked over to invert the flask above the support 8, the table whichwas free to vibrate independently of the frame being locked rigidly to the frame as soon as the swinging of the latter begins. When the flask has been properly supported in its new position, it .with its cover are freed from the tablelO and lowered gently drawing the mold from the pattern, and then the table, still locked to the frame, is swung back to initial position ready to receive another flask, the table and frame having been automatically unlocked again when as the framedescended the ends of the rod-extensions 23 struck the standard 6 shifting the slide valve and allowing the air" to force the blocks 18 away fromthe surfaces 14.

It is evident that, from the operator, table and flask are from the swinging above set forth.

without any attention the pattern-supporting locked to and unlocked frame at the proper times, the locking being by aforce like that of a wedge driven by fluid under pressure.

Obviously the invention is not limited to any specific air-valve arrangement nor to having the piston moved one way by a spring, nor to the exact construction in other details.

i What I claim is:

1. In sand jarring machines for molding the combination with a suitably mounted rock-over frame, of a normally horizontal pattern-supporting device secured to said frame by a series of vertical rods or bolts initially allowing free limited separation of the connected parts, a fluid pressure device for'acting upon. the bolts simultaneously to bind the pattern supporting devicerigidly to the frame, and meanswhereby the weight of the frame and its load holds saidfluid pressure device out of action while the parts are in position for jarring.

2. In sand molding apparatus, the combination with'jarring mechanism, of a rigid standard and a sand jarring device alongside the standard, a pattern plate and flask carrying frame pivoted to the standard to swing the plate and flask to and from position upon the jarring device, pneumatically operated means for locking said plate and frame rigidly together, and a gravity actuated member carried by the frame and hold ing said means out of action only while the frame is in jarring position.

3. In sand molding apparatus, the combolt-connecting bars, locking secured to the bination with a jarring mechanism and a standard alongside the same, of a rock-over frame adapted to swing a patternsupport and flask to and from position upon said jarring mechanism, pneumatic means for rigidly locking together the frame and pat tern support, a movable member controlling said means, mounted upon said frame in positiontdbe pressed against said standard by the weight of the frame when in jarring position and by consequent displacement to hold said means out of action, and a spring for restoring the displaced member to initial position. i

4. In sand molding apparatus, the combination with a rock-over frame, of a pattern and flush supporting member tied to the frame by 'a' series of bolts primarily allowing free limited separation of the frame and member, devices carried by the frame for applying wedge like force to said bolts to draw said member rigidly against the frame, means for applying pneumatic actuating powerto said devices, and means whereby gravity prevents the action ofsa'id power while the flask is in jarring position.

5. The combination with sand jarring devices and a standardalongside the same, of a rockover frame provided with a flask sup port and adaptedto carry a flask to and from thejarring devices, a series of vertical rods passing downward from said support through a portion of said frame, a bar con necting the lower portions of two of said rods and having an upper inclined surface, a block adapted to be pushed along said surface, a fluid pressure cylinder mounted on said frame and arranged to force said block along said surface while holding it against lateral displacement thereby for binding said support rigidly to said frame, and means whereby the block is kept from said surface while the parts are in position for jarring.

6. The combination with a sand jarring mechanism and a standard alongside the same, of a rockover frame pivoted to said standard, a flask support connected to the frame byvertical rods, bars on each side of the frame, respectively, connecting the lower ortions of the rods upon the corresponding sides, fluid pressure cylinders mounted on thesides, respectively, of the frame and arranged to force said bars laterally to pull the rods and thus bind the support to the frame, springs tending to hold the fluid pressure devicesin' operation, and means whereby the springs are prevented from acting so long as the parts are in jarring position.

' 7. The combination with a standard, of a rock-over frame pivoted to the standard to swing in a vertical plane, a table parallel to thelframe and capableof independent vibration, a compressed fluid cylinder mounted on the frame, a piston working inthe cylinder and having upon the exterior portion of its piston. V p g 8. The combination with ajarring device,

of a-rock-over frame, a flask support normally located upon the upper face of said frame, a fluid pressure cylinder parallel to said support, secured to the opposite face of the frame and having on its rod a lateral projection, bolts extending from said supprojection,devices in the path shifts port to a plane below the frame, a bar-connecting adjacent bolts below the plane of the cylinder and having aface in and inclined to the path of said projection, 'a valve for admitting fluid to the cylinder to drive said projection along said face, means whereby swinging the frame to jarring position the valve causing reverse movement of the piston and a spring tending to keep the valve in its normal position.

In testimony whereof I hereunto affix my signature.

HENRY TSGHERNING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of- Patents,

Washington, D. 0. Y 

